java调用第三方bankingcircle的接口查询汇率接口

以下是Java调用第三方bankingcircle的接口查询汇率接口的示例代码：

import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.net.HttpURLConnection;
import java.net.URL;

public class BankingCircleExchangeRate {
    public static void main(String[] args) {
        try {
            // 设置请求URL
            String url = "https://api.bankingcircle.com/v1/exchangerates?from=USD&to=EUR";
            URL obj = new URL(url);
            HttpURLConnection con = (HttpURLConnection) obj.openConnection();

            // 设置请求头
            con.setRequestMethod("GET");
            con.setRequestProperty("Authorization", "Bearer <your_access_token>");

            // 发送请求
            int responseCode = con.getResponseCode();
            System.out.println("Sending GET request to URL: " + url);
            System.out.println("Response Code: " + responseCode);

            // 读取响应
            BufferedReader in = new BufferedReader(new InputStreamReader(con.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();
            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
            }
            in.close();

            // 打印响应结果
            System.out.println(response.toString());
        } catch (Exception e) {
            e.printStackTrace();
        }
    }
}

其中，需要替换掉<your_access_token>为自己的访问令牌。如果访问成功，会返回如下格式的JSON数据：

{
    "from": "USD",
    "to": "EUR",
    "rate": 0.835,
    "timestamp": "2021-01-01T00:00:00Z"
}

其中，rate字段表示汇率